Glass blowing machine



Filed Jan. 7, 1942 1o sheets-sheet 1 P. CALZ ew -f INVEN-roR -4 'a AT TRNHS A131513, .1945 R. G. ALLEN 2,372,642

GLASS BLOWING MACHINE Filed Jan. 7, 1942 1o sheets-sheet 2 April 3, 1945. R. G. ALLEN v I l GLASS BLOWING MACHINE Filed Jan. '7, `194,2 1o sheets-sheet s INVENTOR ATTORNEYS April 3 1945- R. G. LLx-:N 2,372,642

I GLASS BLOWING MACHINE Filed Jan. 7, 1942 1o sheets-sheet 4 22 galline a EN@ v ATTORN EYS April 31 1945- v R. G. ALLEN 2,372,642

GLAS S BLOWING MACHIN Filed Jan. 7, 1942 10 Sheets-Sheet 5 INVENTOR f 1i BY www ATTORNEYS April 3, 1945. R. G. ALLEN 2,372,642

l* GLASS BLOWING MACHINE Filed Jan. '7, 1942 lO Sheets-Sheet 6 :tao

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ATTORNE S April 3, 1945. R. G. ALLEN GLASS BLOWING MACHINE Filed Jan. '7, 1942 10 Sheets-Sheet '7 INVENTOR BY@ i?, 7&0/

ATTORNEYS "aae am l April 3, 1945- R. G. ALLEN x 2,372,642

GLASS BLOWING MACHINE Filed Jan. '7, 1942 lO Sheets-Sheet 8 Q/Zien I INVENTOR BYQPWQL ATTORNEYS April 3; 1945. vR, ALLEN 2,372,642

'GLASS BLOWING MACHINE Filed Jan. 7, 1942 1o sheets-she@ 9' GATHERsNG por Q. GgZZevz INVENTOR ATTORNEYS l April s, 1945. R. G. ALLEN 2,372,642

GLAS S BLOWING MACHINE Filed Jan. 71942 l0 Sheets-Sheet 10 BLANK Mom OPE AQ. Gjlue INVENTQ' www ATTORNEYS Patented Apr. 3, 1945 GLASS BLOWING MACHINE Russell G. Allen, Alton, Ill., assignor to Owens- Illinois Glass Company, a corporation of Ohio Application January '1, 1942, Serial No. 425,838

29 Claims.

. My invention relates to machines for blowing glassware, such as bottles, jars and other hollow articles, and comprises means to facilitate changing of the molds while the machine is in operation. The invention as herein illustrated is embodied in an automatic glass blowing machine of the Owens suction gathering type, comprising a mold carriage which rotates continuously about a vertical axis and a series of heads orunits rotating with the carriage. Each unit includes a mold group comprising a partible neck mold, a partible blank mold adapted to register with the neck mold, and a partible finishing mold. The blank mold is positioned beneath the neck mold and when closed registers with the closed neck mold to form a parison mold which is periodically lowered into contact with a pool of molten glass from which charges of glass are drawn into the mold. After the parison has been formed, the blank mold is opened, leaving the parison suspended from the neck mold. The finishing mold is then swung upward and closed around the parison and the latter blown to nished form therein. Thereafter the neck mold is opened and the finishing mold with the blown article therein is swung downward in order to clear the pot from y which the glass has been drawn. After passing the pot the finishing mold is swung upward to an intermediate position and opened to discharge the blown article.

In machines of this type it is frequently necessary to change certain molds or an entire set of molds and'it is highly desirable to provide means permitting the molds to be changed while the machine is running. Where it becomes necessary to stop the machine for changing molds, produc- A further object of the invention is to provide control devices individual to the mold groups whereby any selected mold group may be thrown out of operation in a manner to permitl mold changing without interfering with the continued normal operation of the other mold groups.

In a machine of the type indicated it is necessary for each finishing mold to be swung downward as it passesthe gathering pot to prevent interference. An object of the present invention is to provide controlling means individual to the mold groups whereby a selected finishing `mold may, during a predetermined portion of each rotation of the mold carriage, be held in an intermediate position suitable for a mold changing operation, and also caused to swing downward for clearing the gathering pot during each such rotation of the carriage.

A further object of the invention is to provide manual control devices individual to the mold groups, each control device'being operable to control the three mechanisms which are brought into activity for mold changing operations, namely, the mechanism controlling the opening and closing movements of the blank and neck molds, the mechanism controlling the opening and closing movements of the finishing mold, and the mechanism for controlling the up and down swinging movements of the finishing mold carrier.

Other objects of the invention will appear hereinafter.

tion is interfered with owing to the time which is lost while the machine is not running and the further time required for reestablishing temperature and operating conditions when the machine is again started.

In machines of the type indicated thetime interval during each rotation of the mold carriage permitted for mold changing operations is very short and often insuicient to allow the removal or replacing of molds. This is particularly true in regard to the neck molds which are only opened for a short time as required to release the blanks. The finishing molds also remain closed the greater lpart of the time and when openvare inaccessible for mold changing. An `object of the present invention is to provide manually cone trolled means for holding the molds open and in accessible position a sunicient length of timev to permit changing them without stopping the machine or slowing down the mold carriage.

The present application discloses subject mat ter, including the mechanism for controlling the opening and closing movements of the blank and neck molds 'disclosed and claimed in my cepending application. Serial Number 425,840, filed January '7, 1942. The mechanism shown in the pres ent application for controlling the opening and closing movements of the finishing mold is disclosed andclaimed in my copending application` Serial Number 425,839 filed January 7, 1942, now Patent No. 2,351,899, granted June 20, 1944, Mold operating mechanisms.

Referring to the accompanying drawings which illustrate the invention as applied to a machine of the Owens type for blowing bottles and other hollow ware:

Fig. 1. is a sectional elevation of they machine, parts being broken away, showing one head or unit.

Figs. 2 to 11 inclusive illustrate the mechanismand neck mold, and control devices for controlling the opening and closing of the molds in a manner te permit changing of the molds while the machine is running.

Fig. 3 is an end elevation view of the mechanism shown in Fig. 2.

Fig. fi is an enlarged section at the line 4-4 on Fig. 3, showing valves and their operating means.

Fig. 5 is a part sectional plan view of a piston motor and a valve controlled thereby.

Fig. 6 is an enlarged section at the line 6-6 on Fig. 2.

Fig. 7 is a section at the plane-.of the line I-l' on Fig. 3.

Fig. 8 is an enlarged'section at the line 8-8 on Fig. 3.

Fig. 9 is a, View similar to Fig. 8 but showing the parts in a, different relative position.

Fig. l0 is an enlarged section at the line itii6 on Fig. 2.

Fig. 11. is an enlarged sectional; theline i I-l I on Fig. 3.

Fig. 12 is a plan view-of a manual 'controlleven herein referred to as an air valve'leven to operate the valve shown in Fig. 13 and thereby set the apparatus for a mold changing operation.

Fig. 13 is a section atthe line 1'3--13 on Fig. '12.

Fig. 141 is a diagrammaticview of thepneumatic control system, the air motors land 'control valves being shown in section.

Figs. 15 to 2.0 inclusive 'illustrate Aa mechanism for controlling the finishing mold vopening and closing mechanism when 'set -for mold changing operations.

Fig. 15 is a part-sectional plan `view 'snowing the cam operated slides for opening and closing the nishing mold.

Fig. 16 is a longitudinal, Vvpart sectional elevation at the line lB-l 6 on Fig. 15.

Fig. 17 is a view similar to '-Fig. 16 but showing parts set for mold changing.

Fig. 18 is a View of `mechanism shown vin'Fig `I5, partly in plan and partly in section at the line llii8 on Fig. 20.

Figs. 19 and 20 are cross-sections at the Tlines iii-i9 and E-Z respectively 'on Fig. 18.

Figs. 2l vto 26 inclusive illustrate mechanism for lifting' and lowering the nishing mold and yfor controlling the lifting and lowering movements when ythe mol-d `unit is set fora mold changing operation.

Fig. 21 is a plan view, with parts broken away, showing the mold swinging mechanism.

Fig. 22 is a sectional elevation at the lineZZ-Z'Z on Fig. 21.

Fig. 23 is a section at the line '2S- 23 on Fig. .21.

Fig. 24 is a section at the line 2id-2li on Fig. 22.

Fig. 25 is a part-sectional plan view on a comparatively large scale of mechanism shown in iFig. 21 but with the slides moved inwardly.

Fig. 26 is a part-sectional elevation vshowing cam shifting.mechanismshowniin Figs.'21 and 23.

Fig. 27 isa bottom :part sectional view showing particularly the cams `for controlling the up and down swinging movements of the finishing molds, the center column of the machine being shown in section.

Fig. 28 is a section at the line 2Q-28 on Fig. .27.

Fig. 29 is a, cam chart.

Referring particularly `to Fig. 1, the .machine comprises a mold lcarriage 316 :mounted .'for vcontinuous rotation about the vertical raxis of .a 'stationary center column 3i. The :carri-.age .maylbe rotated bya motor fdriven .pinion .3.2 which runs in mesh with a ring gear 33 on the carriage. A plurality of heads or units which may be arranged in an annular series on the mold carriage, each comprises a mold group including a blank mold 34a (Fig. 29), a neck mold 34, and a :finishing mold 35. The molds and their operating mechanisms may be in the main of conventional construction Yand operation, .except as such mechanisms are :modified to `cooperate with means comprised in the present invention for controlling the mold movements to facilitate mold changing operations. For a full disclosure of an Owens-type of machine, reference may be had to the patent to La France, 1,185,687, June 6, 1916. .Reference .may .alsobe had to the Allen patent, YNumber 2,269,391, January 6, 1942, Machine for 'molding glass articles, which discloses a machine of substantially the same construction as that to which the present invention is applied as herein illustrated. s

The neck mold sections 34 (Fig. 1) are carried on arms ,36 mounted to swing about a pivot pin 31 for opening and closing the neck mold. The blank moldsections are in like manner carried on arms 365iL mounted Yto swing on the pin 3l. These movements of the blank mold and neck mold are ycontrolled by-a stationarycam track 38 formed 'on a cam plate 39. A cam roll 49, running on the cam track 38, is carried by an upper slide f4! having a yielding connection with a lower slide 43. Said connection includes a rod 4221 -slidable in a connector d'2, .and compression spring 42h coiled on .the rod. The-slide 43 has operating connection through a rod 44 with `the blank mold carri/- ing arms Whichfoperate :in a .conventional manner to swing the neck mold arms and open the neck .mold .during the nal opening movement o1 the blank mold. The opening and closing of thc neck mold .is effe'cted'bya neck mold-cam 38e (Fig. 29') ywhichforms a part of the blank mold cam 33.

The finishing mold sections 35 are carried on arms 45 pivotally mounted Yfor swinging movement on a frame 45, Yherein Yreferred to as the finishing mold carrier. ySaid frame ris mounted as usual to swing `up and downabout a horizontal axis lila forlifting thenishing mold into register with the-neck mold 311 and for lowering the finishing Inold.

The opening and closing movements of the nishing mold are under the control of astationary cam track lll Aformed on a cam plate A58. A cam roll 49 running-on the cam track is'carried on an -upper slide operatively connected, as fully described hereinafter, to a lower slide 5l, which has operating connections with the mold swingingarmsfd.

The up ,and down swinging movements of the nishing mold-carrierllfi` are controlled `by a cam track -52 on a stationary cam rplate Y53. A cam roll 54 running on the cam 52 is carried by an upper slide 55 operatively connected to a lower slide .56. The latter has Ia vlink connection'l with a vbracket v5S xed to and forming a jpart vof the mold-carrier M5. The slides Eiland 50a-re mounted to reciprocate in afslide'frame 5,5

The orderofsequence in which the-mold movements ytake place during .the normal operation of .the machine for forming the articles and Ialso when 4the control-devices are set for mold changing operations, will be vunderstood by reference .to the cam chart, Fig. 29. When a mold vgroup is in the position indicated byline A, the'p'arison mold is over the 'gathering pot P and in dip for gathering a charge of glass, the iblankmold being closed andin register with :the closed neck mold.

'I'he finishing mold at this time also hasv been closed and swung downward to itslowermost position for clearing the gathering pot. As the mold group advances to position B, the finishing mold carrier swings upward to an intermediate angle and when the position C is reached, the finishing mold has been opened to discharge the finished article. By this time the blank mold also has been opened under the control of the cam 38 and then remains open during the greaterI por',- tion of its complete rotation with the carriage. After the finishing mold has been opened it continues its upward swinging movement and Awhen the point D is reached, is in its lifted position and as it advances from this point is closed around the parison which at this time is suspended from the neck mold. The parison is then blown to linished form. The linishing mold `remains closed until it has again passed the gather ing pot. The neck mold 3d is opened when the neck moldcamsection 38"L is reached, thereby re" convenient Afor changing the4 finishing molds. f

The angular position of the mold is indicated in dotted lines at a, The mold carrier is retained at this angle until it reaches the transfer zone S (Fig. 29) near the gathering pot when it is again placed under the control of the Amain cam 52 (as hereinafter described) so that the mold oarrier is swung down to clear the pot, and then as it swings upward and reaches said intermediate angle, is again placed under the control of the auxiliary cam track |5I. When the apparatus is set for mold changing operation, the opening and closing movements of the finishing mold are also taken out of the control of the cam 41, so that the finishing mold is held open while in its inclined position under the control of the cam |5|. Whenmthe apparatus isset for a mold changing operation, the blank and neck molds also are taken out of the control. of their cam 38, 38a. The opening of the neck mold then takes place when the blank mold is opened, as hereinafter described, independently of the neck mold opening cam 38a..

Three separate mechanisms are provided on each mold unit for controlling the movements of the molds when set for mold changing operation. The rst mechanism controls the opening and closing movements of the neck mold. The second mechanism controls the opening and closing movements of the nishing mold, and the third mechanism controls the Iswinging movements of the finishing mold `carrier by which the finishing mold is liftedv and lowered. These mechanisms are embodied in a fluid (preferably air) control system which is manually set for operation by a hand lever, herein referred to as the air valve lever, whichcontrols the supply of an oper-ating fluid, as air, to said system.

The mechanism for controlling the movements ofthe blank and neck molds will now be den scribed, having reference to Figs. 1 to 14 inclusive.

The lower slide 43 is mounted in a slide plate (Fig. 2) for reciprocating movement toward and from the center of the machine for opening and closing the blank and neck molds.. The plate 60 is secured to the dip frame lil (Fig. l) by which the mold is lowered and lifted to and from the glass in the gathering pot or tank. The operating connection between the slide 4| and the rod 44 (Fig. 1) includes a flanged collar 62 which is pinned to the rod 41| and engages a. boss on the slide 43. During normal operation, as the cam 38 draws the slide 4| inwardly toward the center of the machine, it operates through the rod 42a, and slide 43 to draw the rod 44 inwardly and open the neck molds which are being held closed by a spring 63 held under compression between said collar and a sleevel |515 (Figs. 14 and 2*) slidably mounted on the rod, said sleeve also being slidable lengthwise in the end of the plate 60. v

During the normal operation of the machine the sleeve 64 is held in the position shown in Figs. 1 and 2 by a lever 65 pivoted at 56 on the plate 60. The lever G5 is operatively connected through a link 61 with the piston rod 68 and piston 69 of an air motor lll. The lever 65 is normally held in the posi-tion shown (Fig. 2) by a latch 1| pivoted at 12 to the motor cylinder. The latch is released by the operation of an air motor 13 (Figs. 2, 5 and 14) operating in the manner hereinafterdescribed. The motor 13 includes a piston 14 normally held in its inward position by a spring 15, said piston carrying a plunger 16, the outer end of which engages the latch arm 1| so that when the piston is moved outward, the latch is released from the lever 65. A lever 11, fulcrumed at 18 on the casing of the motor 13, has a slot and pin connection 19 with the latch arm 1|. yThe outer end. of

the lever 11 engages a valve plunger 89 of a` valve 9| (Figs. 5 and 14) mounted in a valve casing attached to the motor 13. When the plunger 16 is projected and releases the latch arm 1|, the latter operates through the lever 11 to open the valve 8|.

Referring to Figs. 2, 3, 8 and 9, a bracketA '8 and 10) which cooperates with a latch lever 99 pivoted at 9| in an arm 92 which is secured to a. valve operating rod 93. As shown on Fig. 4, the rod 93 carries heads 94 and 95 attached to its opposite ends respectively, the head 94 being formed integral with the arm 92. Said heads 'are in engagement with valve operating plungers for opening valves 9S and 91 respectively. Said valves and the rod 93 are mounted in e, valve casing`98 attached to or formed` integral with the bracket 82. The rod 93 is normally held in the Fig. 4 position by a coil spring 99a, in Vwhich Iposition it holds the valve 91 `open while vthe valve 96 is yheld closed by a spring 99. When the rod 93 is moved to the right as hereinafter described, it opens the valve and permits the valve 91 to be closed by its spring tilt.

The latch 99 (Figs. 8 and 9) cooperates .with a dog `IUI which rocks on a pivot pin |i`s2 in the bracket 82. The dog is formed integrally with `a rock arm |03 carrying a roll |04 which projects with .a cam surface |05 which, when the :slide 43 is moved inwardly, namely, .toward .the centerof the machine, for opening 'the molds, .swings .the yrock arm |03 vand dog |0| into the full line position (Fig. 8), said dog and arm being .returned to the broken line position by a yspring actuated 'pin |06 when the slide is movedoutwardly.

The operation of the cam 89 (Fig. 8) is .manually controlled by the air valve lever .|07 (Figs. 12, 13 and 14) .mounted on a bracket I 08 and formed with a `cam |09 which, when the hand lever is lowered, moves a valve rod |.I .inwardly `and opens a valve in'a valve chamber I I2. When the hand lever is .lifted the Valve 'is closed by a spring |I3. Air pressure lines (Figs. l, 13, 14) individual to the mold groups or units, extend from `an annular air pressure chamber |I5a on the carriage to each valve chamber ||2 so that when the valve I I I is opened, air pressureis supplied through a pipe I IB to the piston motor 83 which operates through the rack and pinion mechanism to swing the cam 89 and `release the latch 90 (Fig. 9). f

The operation of the above described control mechanism for the neck and blank molds :is as follows: When the air valve lever |01 is thrown down .to cause the cam 89 to withdraw and release the latch 90, as above described, the latch is swung outwardly by its spring II'I for cooperation with the dog IOI. vIf at this time the .slide 43 .isin its outward position, or if not, .then when the slide .is moved outwardly so as .to permit the dog I0! to move to the broken line position (Fig. 8), the latch 90 swings upward `to engage the dog. When the slide 4,3 again moves inwardly and actuates the arm |03, the dog |0I is moved to the full line position and thereby moves the latch 90 bodily t0 the right a short distance, carrying with it the valve operating rod 83. This serves to reverse the valves 98 and 91 (Figs. 4 and 14). That is, the valve 9B -is opened and the valve El is closed.

Referring to Fig. 14, it will be seen that the air pressure line I|5 extends to the right-hand end of the Valve chamber of the valve 98 so that air under pressure is supplied through the valve and a pipe |I8 leading therefrom to the lower 4end of the piston motor 73. The motor therefore operates the plunger 'i6 and swings the latch .lever A'I'I (Fig. 2) to release the lever 65 and at the same time actuates the lever 'Il and thus opens the valve 8|. Air under pressure is also transmitted through the pipe ||8 (Fig. 14) and a branch pipe ||9 (Figs. 2, 11 and 14) to the left-hand end of` a valve chamber |20 in which is mounted a valve I 2| controlling the air supply to the motor 10. The air pressure through the pipe ||9 moves the valve to the right and thereby opens communication through a pipe |22 to the left-,hand end of the motor cylinder. At the same time the valve 8| is opened (as above described) by the lever so that air under pressure is supplied therethrough to a pipe |23 .and the'pipe .|22 to the motor 'I0 and moves the motor piston 69 vto vthe right. The lever 05 (Fig. 2.) is thus actuated and moves the sleeve 54 to the left. The sleeve 64 operates through a head |24 on the rod 44 to move the latter to the left or inwardly and thus moves the neck molds to open position and holds them open aslong as air pressure is maintained in the motor 'I0 for holding the piston 60 in its air operated position. `While the arpressure is maintained in the motor, the slide 4| may Ycontinue its .inward travel when the .neck mold into thepathofthe .-slide43. The slide is formed vopening cam .38P- (Fig. 29) is reached, ibut 'this is and idle movement. Evidently'when the cam 38 .moves the slide outwardly for closing the blank mold after traveling in open position with the mold carriage through a half revolution of the carriage, the cam |05 on the slide 43 (Fig. 8) 4will release the lever |03, permitting it to swing inwardly. This allows the spring 53a to return the .rod 93 to its original position, thereby closing the valve 96 and opening the valve 91 (Figs. .4 and 14). When the valve 98 is closed it cuts oil and exhausts the air from the valve piston |2| (Fig. 11.) and also from the air motor 'I3 (Figs. 2 and .5), thereby allowing the spring l5 to retract the piston '|4 and plunger 18, but as the lever 85 is holding the latch 'II in its outerposition, the air valve 8| is held open by the lever ll'. At the same time that the valve 96 is closed the valve 9T is opened and allows air under pressure to enter the .right-hand end of the valve |20 (Figs 1l and 14),

thereby vforcing the piston |69 to the left, which operates to swing the lever in a counter-clockwise direction. The lever thus forces the sleeve 64 (Figs. l and 2) and spring 03 to the right. The spring operates through the collar 82 to move therod 44 to the right, thereby closing the neck molds 34. When the motor piston 00 reaches the end of its stroke, it allows the latch II to drop behind the lever 65 so that the neck molds are held closed for normal operation. When the latch 7| drops, it also actuates the lever permitting the valve plunger 80 to move outwardly, thereby closing the valve 8| and cutting oil the airsupply through said valve. This cycle of operation is repeated during each revolution of the machine while the mold control valve III (Figs. 13 and 14) remains open.

The mechanism for controlling the opening and closing movements of the iinishing mold 35 will now be described, reference being had to Figs. `14 to 20 inclusive. The upper and lower slides 50 and 5| are mounted to reciprocate in slide lways in a frame |30. Blocks |3| and |32 (Fig. 16) secured respectively to the upper and lower slides provide a driving connection between the slides by which the inward movement of the upper slide is transmitted to the lower slide for opening the finishing mold. During the normal operation of the machine the outward movement of the upper slide is transmitted to the lower slide through a latch |33 which is pivoted at one end in the block |3I, the free end of the latch being arranged to engage the slide 5|.

When the manual control valve III (Fig. 14) is opened to set the mechanism for mold changing, air pressure is supplied through the pipe I I6 and a pipe |34 to a piston motor |35 (Figs. 14 to 18) 'carried on a bracket 38 having a fixed mounting inthe guide frame |30. .A plunger i3? on the motor piston engages a rock arm |38 pivoted on arod |39. A latch arm |40, which may be integral with the arm |38, is formed with a cam sur- 'face |4| adapted to engage a .linger I 42 pivoted in the slide 5|.

When airis supplied to the motor |35 it operates to swing the arm |'40 upward so that when the lower slide 5| moves inwardly or to the left from theFig. 16 position, the linger |42 is cammed upwardly and lifts the latch |33. This releases the upper slideso that it may move outwardly independently of the lower slide. The outer end of the lever |40 is formed with hooks or shoulders |43 to engage the slide 5| at opposite sides of the linger |42, thus holding the slide in its inner position with the mold sections held apart. The

mold is'thus held open as long as the air pressure is maintained in the motor |35.

Spring buffers |44 are mounted in the frame |30 in position to be engaged by contact pieces |45 on the inner end of the slide 5| as the latter nears its innermost position. When the latch lever |46 has been moved upward to its operative position, and the upper slide 56 moves outwardly, the buffers |44 serve to apply a yielding pressure of the slide against the hooks |43. This prevents the latch |46 from dropping and releasing the slide 5| when pressure is cut off from the motor |35, until the upper slide has been moved inwardly again to engage the lower slide and thus release the latch lever which then drops by gravity. Thus premature outward movement of the lower slide and closing of the finishing mold are prevented. The buiers |44 also insure contact between the blocks |3| and |32 and thereby allow ample clearance for the latch |33 to drop in place.

The mechanism for controlling the lifting and lowering movements of the nishing mold carrier, as shown in Figs. 1, 14, 21 to 28`inclusive, will now be described. The normal up and down swing ing movements of the mold carrier as before noted are controlled by the stationary cam track 52. Referring to Fig. 27, the cam track 52 comprises a section extending from the radial line 522L to 52h, inclined toward the center of the machine for moving the cam roll inwardly, thereby lowering the mold carrier to clear the gathering pot, the position of which is indicated by the arrow |50. Commencing at about the line 526, the cam roll is moved outwardly to lift the finishing mold to an intermediate inclination which is maintained while it passes through the discharging zone extending between the points 52d and 52e, during which the mold is opened and ythe blown article discharged. The cam track from point 52e to 52f is shaped to complete the lifting of the mold carrier to its horizontal position, which is maintained until the cam roll again reaches the point 52a. t

During a mold changingy operation the mold carrier is taken out of the control of the main cam track 52 during a certain portion of each rotation of the mold carriage and during such time is under the control of an auxiliary cam track' |5| formed on a stationary cam plate |152 mounted on the center column 3|. The auxiliary cam track as shown in Fig. 27 comprises a portion concentricA with the mold carriage and so positioned that the mold carrier is held thereby at an angle between its horizontal or lifted position and its discharging position. This angular position or degree of elevation at which the mold carrier is held by the cam track |5| to permit changing of the mold is indicated at 58a (Fig. 1)being at an angle of about 35 to the horizontal. The discharging position 56b in the particular construction shown is at an angle of 55 to the horizontal. The lowermost position 58c is that assumed while the finishing mold is passing the gathering pot.

During normal operation of the machine a driving connection between the upper and lower` slides 55 and 56 is maintained by means of a cross-bar |53 secured to the slide 56, and a connector in the form of a cross-slide bar |54 mounted for sliding movement in the upper slide 55. The bar |53 is formed with lugs |56 on its upper surface in the path of lugs |51 formed on the under side of the slide bar |54. v The weight of the mold carrier 46 serves normally to hold .the lugs.v

|56 in contact with the lugs |51. A bar |53 (Fig. 22) is bolted to the lower slide 56 at theleftor inner l gravity, thus moving the lower slide 56 inwardly.

If, for any reason, this gravity movement is interrupted or prevented, the lugs |51 engage the bar |58 and move the lower slide inwardly. The bar |58 thus serves as a safety means to insure the mold carrier being lowered as the cam roll 52 is moved inwardly.

The slide bar |54 is movable lengthwise to carry the lugs |51 out of register with the lugs |56 to permit idle movement of the upper slide 55 when the lower slide is under the control of the auxiliary cam track |5|. Friction disks |54a (Fig.

23). bear on the slide bar |54 to prevent acci dental movement of the slide bar.

The means for actuating the slide bar |54 includes an air motor |59 (Figs. 14 and 21) under the control of the manual control valve (Fig. 13). The motor includes a piston |66 and a piston rod |6| `connected to one arm |62 of a bell crank lever pivoted at |63 on a bracket carried by the slide frame. The other arm |64 of the bell crank has pivoted thereto an arm |65- which functions as a cam, being formed at its outer end with a cam surface |66 adapted to be moved into the path of the cross-bar |54. A coil spring |61 holds the cam arm |65 in its operative position (Fig. 21) relative to the arm |64, while permitting it to` swing about its pivot when engaged by the slide bar |54 as the latter moves inwardly with the slide 55.

When the control valve is opened by the hand lever |61, air under pressure is supplied to the motor |59 which then operates to move the cam |65 inwardly into 'the path of the cross-slide bar |54. If the slide 55 at this time is in its outward position or in such position that the cross slide bar |54 is to the right of the cam |65 (Fig. 2l), then when the slide 55 is moved inwardly, the slide bar |54 is carried past the cam arm |65, the latter swinging about its pivot. When the slide 55 is again moved outwardly for lifting the mold carrier, the cross-slide bar |54 engages the cam surface |66 so that the slide bar is cammed in the direction of its length and the lugs |51 are thereby moved out of line with the lugs |56, This releases the upperslide 55 so that the mold carrier is left in the control of the auxiliary cam track |5| which operates through means as hereinafter described to hold the mold carrier in position for changing molds. The mold carrier is now in the position indicated at 58EL (Fig. l) permitting the mold changing operations and is retained at this intermediate elevation by the cam track |5| while the slide 55 moves idly outward and then back. As the slide 55, during its return movement, passes the intermediate position corresponding to the position 58a of the mold carrier, the cross-transfer slide |54 carried therebyy is cammed lengthwise by a cam |63 (Fig. 2l) mounted on the slide'frame 55a. This takes place just after the slide bar has passed inwardly beyond the cam |65. This movement of the slide bar |54 again brings the lugs |51 in register with the lugs |56. If the air pressure has been cut olf from the motor |59 in the meantime or is cut off before the slide 55 again moves forward for lifting the mold carrier, then the cam |65 will be withdrawn so that as the slide 55 moves forward, the cross-bar |54 will retain its normal operative position. If, however, air pressure has been |18` onv ank auxiliary lower slide |11 carried. on.

the slide 56, to holdthe mold: carrier in its mold changing position. The primary purpose of mounting the cam. roll |18 on an auxiliary slide, rather than the main lower slidev 56, is to. avoid picking up the load of the mold carrier on the cam at. each rotation'. of the mold carriage during normal: operation and. thereby avoid wear on the cam. The mode of operation by which.

this is accomplished? will appear presently. The auxiliary slide |.1| is mounted. for a limited slid ing movement-on the main lower. slide 58', being slidable in guideways` |12 and its movement being limited by slot and pin connections |13. (Figs. 21 and. 25).* The slide 56.' carries a crossbar |15. formed with lugs |16 adapted to register with lugs |11 formed. on a slide bar |18. The bar |18 isv mounted for lengthwise sliding moyement. in the auxiliary slide |1.| for moving. the lugs |11. into and` outof line withthelugs |16.

Means for actuating the slide bar |18 includes a rock arm |19 pivoted at |88 on the lower side of the slide |1|., said rock arm having a connection |8|1with the-slide bar. The. arm |19 carries a cam followerroll'. |82 and is actuated by a cam |83. The cam: is connected by a pivot |84 to the mold carriage and is swung about its pivotby the piston motor |59. The connections between the motor and cam include alink |85. pivoted at one end tothe camandv at its opposite. end to a rock arm |86 mounted to swing about a pivot |81.

The rock arm is connected through av link |98 (Figs. 21, 26) to a rock arm |9| on the` pivot shaft. |63.

which house a compression spring |92 which serves as a. safety device. A coil spring` |93 held under tension. operates to return the motor piston |68 andI cam |83 when the air pressure is cut off from the motor.

When'the parts are set for' the normal operation of the` machine, with the lugs |16 andv |11 in staggered relation as shown in- Fig. 21, the camv |83 is inoperative to bring said lugs into alignment. In other words, when the cam slides 56 and |1| move inwardly the cam. roll |82 is carried between the cam surfaces |83a and |831u of the cam without shiftingv the slide bar |18. When the motor |59;V has. operated to swing the cam |83- to the broken line, position (Fig. 21),. then the inward movement of the slidey |1| brings the cam roll |82 into engagement with the cam surface |839 and shifts the slide bar |18 to the Fig. 25 position in which the lugs |11 and |16 are in register. The auxiliary cam track 5| and the main cam track 52 are relatively shaped and positioned so'that as the cam roll |18 approaches the slide transfer position S (see Fig. 2'1) at which the cross-slide bar |54 is shifted, the cam roll |18 moves the slides |1`| and 56' outwardly relative to the upper slide 55, a sufficient distance to separate the lugs |56 and. |51 andl thus relieve the. pressure between said lugs. In other words, the pressure due to the Weight of the mold' carrier is taken off. the upper slide 55 and thev cam track 52 and transferred to the lower slide and' auxiliary cam track.

During the normal operation of. the machine, when not set for mold changing, the lugs |16and The link |90 as shown in Fig. 26 isA extensible in length, being made in sections.

agevfaega.

'- cam track |5| while passing the slide transfer zone S'. Coil. springs. |94 (Fig. 25) are held under compression between theA plate and the auxiliary slide |1| for yieldingly holding the latter' in the Fig. 2l' position.

In Fig.4 27 the broken line circles indicate the path which.r the cam roll |10 would need to follow during its passage through the slide transfer Zones in order'for the' main: cam track 52 to carry the. load,- assuming;l the slide |18 to be in its operative position (Fig. It will be noted that this indicated path extendsV slightly inward beyond. the auxiliary cam trackv |5|. In other words, thev track |5|, whichdetermines the path of the am ron.. holds itoutwardiy a short dis tance.- beyond that indicated, and so takes the load off the main cam roll.

It will be noted that as shown in Fig. 27, the main and auxiliary.' cam. tracks 52 and |5| are substantially parallel throughout the portions whichcontrol thezlowering and lifting of the mold carrier so that the finishing mold is always lowered to clear the gathering pot even when the apparatus is set for mold changing operations.

Moreover,I the transfer slide |54 is always shifted for. normal operation by the cam |68 (Fig. 21) when the cam slide. is moved inwardly' for lowering the mold carrier,V unless already in such position. If, however., the apparatus is set for mold changing, that is, as long as air pressure is maintained. in' the; motor |59, the transfer slide |54.is returned by thecam. |66 as themold carrier swings upward at. the slide transfer zone S', to release the'l control from the main track 52 to the auxiliary track |5| for holding the carrier in its mold. changing position 58a as above described.

The operation may be summarized as follows. When it is desired to change the molds on any unit of the machine, the. air valve lever |01 (Fig. 14) for said unit is thrown to open the valve If. desired, the; vacuum line. of said. unit may also be closed as isusual. for mold changing operations.. Opening of theY valve actuates the three air motors 83', |35 and |59, which respectively control the.. opening and closing of the neck mold, the opening and closing of the nishing mold, andthe up and down swinging movements ofthe finishingmold carrier. The motor 83 then operatesas heretofore described to effect an operation. of the air motors 13 and 1|! (Fig. 2), the latter operating throughV the lever 65 and sleeve 64. to open the neck mold and hold it open for the mold` changing operation. The motor |35 operates the. latchl mechanism (Figs. 16' and 17) and thus releases the cam operated' slide 5| from the control of the cam 41 which normally opens and closes the finishing mold. Such operation of the latch mechanism also causes the latch |48 to hold the nishing mold in open position. The motor |59 at the same time operates the cams |66 and' |83 (Fig. 21)' so that the transfer slide |54 is shifted by thev cam |66 to transfer the control of the mold' carrier'to the auxiliary cam |5| as the moldv moves upward after discharging the blown article. The cross bar |15 is now in the position shown in Fig. 25', with the lugs |16 and |11` in register., and the auxiliary cam operates through the roll |18, auxiliary slide |1| and slide 56 to hold the carrier in a mold changing position until the finishing mold again nears the gathering pot. The cam |83; operatesthe means by which the pressure on the transfer slide |54, due to the weight of the mold carrier, is taken on? the slide, permitting its free operation.

The three control mechanisms cooperate to hold the neck mold, blank mold and finishing mold open concomitantly and in convenient position to permit the molds to be lifted off their carrying arms and replaced by other molds, such position being retained while the carriage travels th'rough approximately one-half of a complete rotation. The molds are thus held during each rotation until the manual control valve III is again closed and the normal operating conditions are automatically reestablished.

`Modifications may be resorted to within the spirit and scope of my invention.

1. A machine for forming glass articles comprising a mold carriage, means for rotating the carriage, a partible neck mold, a partible nshing mold cooperating therewith, said molds being mounted on the carriage for rotation therewith, means for periodically opening and closing the neck mold, means for periodically opening and closing the finishing mold, a manual control device, and means actuated thereby for taking the said molds out of the control of said mold opening and closing means, and separately controlling the opening and closing movements of the molds during the rotation of the mold carria e.

2g. A machine for forming glass articles comprising a mold carriage, means for rotating it continuously, a mold group mounted on the carriage including a partible neck mold and a partible finishing mold, mechanism for opening and closing the finishing mold, mechanism for swinging the finishingr mold into and out of register with the neck mold, a manual control device operable to take the molds out of the control of said mechanisms, and means controlled by said manual control device to hold the molds in predetermined positions to facilitate mold changing operations, said control device being operableto again bring the molds under the control of said mechanisms while the carriage is rotating.

3. A machine for forming glass articles comprising a mold carriage, means for continuously rotating the carriage about a vertical axis, a partible neck mold, a partible nishing mold, said molds being mounted to rotate with the carriage, a stationary cam, mechanism for opening and closing the neck mold controlled by said cam, mechanism for opening and closing the finishing mold, a second stationary cam controlling said last mentioned mechanism, means for swinging the finishing mold toward and from the neck mold, a stationary cam controlling said mold swinging means, and manual control means operable while the mold carriage is rotating to take the molds out of the control of said cams and to again bring the molds under the control of said cams.

4. A machine for forming glass articles cornprising a mold carriage, means for continuously rotating the carriage about a vertical ax1s, a partible neck mold, a partible finishing mold, said molds being mounted to rotate with the carriage, a stationary cam, mechanism for opening and closing the neck mold controlled by said cam, mechanism for opening and closing the iinishing mold, a second stationary cam controlling said last mentioned mechanism, means for swinging the finishing mold toward and from the neck mold,A a stationary cam controlling said mold swinging means, manual control means operable while the mold carriage is rotating to take the molds out of the control of said cams and to again bring the molds under the control of said cams, and mechanism cooperating with said manual control means for automatically controlling theI movements of the molds while out of the control of said cams.

5. A machine for forming glass articles comprising a mold carriage, means for rotatingthe carriage continuously about a vertical airis, a neck mold mounted for lrotation with the carriage, a' finishing mold, a finishing mold carrier mounted o-n the carriage to swing up land down for moving the finishing mold into and out of register with the neck mold, a mechanism for opening and closing the neck mold, a stationr ary cam track controlling the operation of said mechanism, a mechanism for opening and closing the finishing mold, a cam track controlling the operation of said last mentioned mechanism, a mechanism for swinging the mold carrier, a cam track controlling said swinging mechanism, devicesindividual to said mechanisms and operable to take said mechanisms out of the control of their respective cams, and manual control means for controlling said devices and effecting.

their operation.

6. A machine for forming glass articles comprising a mold carriage, means for rotating the carriage continuously about a vertical axis, a neck mold mounted for rotation with the carriage, a finishing mold, la finishing mold carrier mounted on the carriage to swing up and down for moving the linishing mold into and out of register with the neck mold, a mechanism for opening and closing the neck mold, a stationary cam track controlling the operation of said mechanism, a mechanism for opening and closing the finishing mold, la cam track controlling the operation of said last mentioned mechanism, a mechanism for swinging the mold carrier, a cam track controlling said ,swinging mechanism, fluid operated motors individual to said mechanisms, means controlled by said motors for taking said mechfanisms out of the control of their respective lcam tracks, and a manual control device for effecting the operation of said motors.

7. A machine for forming glass articles comprising a mold carriage, means for rotating the carriage continuously about a vertical axis, a neck mold mounted forrotation with the carriage, a finishing mold, a finishing mold carrier mounted on the carriage to swing up and down for moving the finishing mold into and out of register with the neck mold, a mechanism for opening and closing the neck mold, a stationary cam track controlling the operation of said mechanism, a mechanism for opening and closing the finishing mold, a cam track controlling the operation of said last mentioned mechanism, a mechi anism for swinging the mold carrier, a cam track controlling said swinging mechanism, means for facilitating mold changing operations while the mold carriage is rotating including means for taking the molds out of the control of ,said cam tracks, holding the neck mold in an open position, holding ythe finishing mold open, and holding the finishing mold carrier at `a convenient inclination for removal of the 1inishing molds, and a manual control device for effecting the operation of said last mentioned means.

8. A machine for forming glass articles com- 'prising a mold carriage, means for rotatingthe a nishing mold: carrier connectedV to the carriagefor rotation therewith and mounted for up and down movements during its rotationr with the carriage througha predeterminedI arc, a Ysta,- tionary cam track, means providing operating connections between said cam track and the carrier for controlling said up land down move'- ments whilethe carrier is. traveling through said arc, a second cam track positioned and. shapedV to control the up and down movements of: the mold carrier while the latter is traveling through said arc, and means for taking the mold carrier out of the control Vof the first said track andv placing and maintaining it under the control of the second cam track during its travelf through said arc. Y

9. AL machine for forming glass articles comprising a mold carriage, means for rotating, the

carriage about a vertical axis; a nishing mold,v

a finishing mold carrier' connected to thel car:- riagel for rotation therewithand mounted for up and down movements during its rotation with the carriage througha predetermined arc, a. sta-V tionary cam track, means: providing operating connections between said cam track and the carrier for. controlling said up and down move,- ments while the carrier is traveling through said arc, a second cam track positioned and shaped to control the up and down movements,v of the mold carrier while the latter is traveling through said arc, and means for taking the mold carrier out of the control of the rst said track and placing and maintaining it under the` control of the second cam track duringv its travel through said arc, said second" cam track being positioned and shaped to hold the mold carrier in an intermediate inclined position suitable to permit mold changing operations during a predetermined portion of the mold travel with the carriage.

l0. The combination of a machine for forming glass articles and a stationary gathering pot,

said machine comprising a moldlcarriage rotat-v able continuously about a vertical axis, a finishing mold carrier pivotally` mounted on the carf riage for up and down swinging movement; a partible finishing mold mounted on the carrier, a stationary cam track, a cam roll running thereon, operating connections between said roll and the mold carrier, said cam track being shapedv andA positioned to guide thek mold carrier downn wardtov a lowered position for passing the gathering pot, and thereafter swinging thev carrier up#- ward, an auxiliary cam track, automatic meansfor shifting the control from the main cam track to the auxiliary cam track and maintaining the carrier under the control of the auxiliary cam track during that portion of each rotation of the mold carriage that the carrier is passingk the` gathering pot and said downward and upward swinging movements or the carrier are taking place-and returning the control to the main cam track during the remaining portion of each rotation of the mold carriage, and a manual control device-for said shifting means.

11. A glass blowing machine of the Owens suction gathering type, comprising a mold carriage', means for rotating it continuously aboutl a vertical axis, a mold carrier mounted on the carriage for up and down swinging movementja mold removably supported on said carrier, a, main stationary cam track, a cam follower roll running thereon, means providing operating connections between the roll and the mold carrier, said cam track being shaped and positioned to hold the carriage about a vertical axis,v a, finishing: mold;v

mold carrier in. its lifted position during a predetermined portion of each rotation of the mold carriage and for lowering and lifting the carrier during other predetermined portions of each said rotation, an auxiliary cam track and an auxiliary` cam follower rol1 running on said auxiliary track,.means providing operating connections between the auxiliary roll and the carrier, said auxiliary cam track being shaped and positioned to cause lowering and lifting of the carrier in substantially ther same path; as when under the control of said main cam track and during substantially the same portions of its rotation, a manual control device, and means controlled by said control device and brought into operation when said control device is: actuated, to transfer the control of said swinging movements of the mold carrier from the main cam track tos-aid auxiliary cam track at a predetermined point during. the rotation of the carriage and again transfer the control tothe main track at a diierentt predetermined point during the rotation of thecarriage.

12A A glass blowing machine of the Owens suction gathering type, comprising a mold carriage, means for rotating. it continuously about a vertical axis, a mold carrier mounted on the carriage for upandv down swinging movement, a mold removably'supportedv onsaid carrier, a main stationary cam track, a. camzfollowr roll runningthereon, means providing operating connections be,- tween the roll and the mold carrier, said cam track being shaped and positioned to hold the. mold carrier in` its liftedv position during a predetermined portion of each rotation of the mold carriage and for lowering and lifting the carrier during other predetermined portions of each said rotation, an auxiliary cam track and an auxiliary cam follower roll running on said auxiliary track,

means providing operating connectionsv between tially the. same path as when under the controlv of saidmain cam' track and during substantially the same portions of its rotation, a manual control device, and? means' controlled by said control device and brought into operation when Saidcon trol deviceis actuated to transfer the control of said swinging movements of the mold carrier from the main cam track to said auxiliaryv cam track at a predetermined` point during the rotation ofthe carriage and' again transfer the control to the main track at a= different predetermined point during the rotation of the carriage, said auxiliary track being'shaped to hold the mold carrier at a convenient angley intermediate itsupper and' lower positions to facilitate moldv changing operations.

13. A glass blowing machine of the Owens suction gathering type comprising a mold carriage, means for rotating it continuously about a vertical axis, a, mold carrier pivotally mounted" on the ycarriage for up and down swinging movement, a finishing mold on said carrier, a stationary cam track, a camv follower roll running on said track, means providing operating connections between the roll and the said carrier, said track-'being shaped to lower the carrier ata predetermined point' during its rotation with the carriage for' passing the'4 gathering pot, then swinging the carrier upwardly to an inclined position permitting'discharge of a blown article from the-mold and thereafter lifting the carrier toI and holding' it in its upper position whileA the:

carriagezrotates'through:a 'predetermined angle., Van,auxiliarystationarycarntrack, transferimeans 'for 'transferring the control of; `the-carrier. from 'the main camLtracktoi-.he auxiliarvcarntrach track, .a l camyfollowergroll running on -said track,

means providing operating connections.' between the -roll and the said carrier; said track. being shaped to lowernthe carrier; at apredetermine'd pointduring its rotation with they carriageor passingthe gathering pot,.then:swingingxthe carrier upwardlyto an inclined position permitting discharge of a blown arti-cle from the` mold vand threafter vliftingy the carrier to land holding it in its upper position while Vthe .carriage rotates througha .predetermined angle, .an auxiliary stationary cam, track; 'transferl means fortransferring the controliof thelcarrierrfromv the vmain cam track Ytothe auxiliary'cam track, a :manual controlfdevicel operable to feiectttheoperation of said transfer means, said auxiliary Vcam track being shaped and positioned to hold the mold carrier atan intermediateiinclined positionduring a predetermined portion of each complete rotation of the mold carriage coincidinginpart `with its rotation through saidpredeterminedangle, and automatic means-for vshifting Vthey .control ofthe carrier to the main cam trackt-atwa predetermined point-and then back to the auxiliary-"cam ltrack at another predetermined point during eachy said rotation of the ,mold carriage.

415. A glassblowing'fmachine .ofthe'Owens suction ygathering .typencomprisinga` mold' carriage, means Afor rotating it'continuously yabout a vertical axis, a mold` carrier pivotally'mounted on the 'carriage for up and downswingingmovement, a nishing mold on `said carrier, a main lstationary cam track, a rcam follower roll running on said track, a .slide carrying. said` roll and mounted for-reciprocating movement radially of the carriage, operating connectionsbetween the slide and they mold carrier including a second slide, a connector `for transmitting movement from onexsaidislide to the other, andmanual control meansoperable to yrendersaid :connectorineffective` and thereby release-the mold carrier from the control yofisaid cam track;

16; A` glass blowing vmachiney ofA the Owens suction gathering type comprising.; amold carriage, meansxfor rotatingfit continuously about a `vertical iaxis, a mold carrier pivotally 'mounted onxthe carriage 'for up .and down :swinging movement, va iinishingmold on saidy carrienfa main stationary cam track, acam follower roll running on said track, a slidecarrying,'saidroll and nfiounted f or reciprocating movement radially of the carriage, operating-connections between the slide and the lmold'. carrier'V including a second slide, Aa connector forA transmitting movement from one saidzslide'to theother, manual control meansoperable to .render `said connector i ineffective :andrthereby releaseirthe mold rcarrierrfrom' thecontrolof said cam track, an auxiliary com, and an auxiliary cam follower Vroll adapted to run. thereon, said auxiliary roll being mounted to reciprocate with vsaid second slide.

1-7. A machine for. blowing glass articles comprising a mold carriage, means for rotating it ycontinuously about a vertical axis, a mold carrier mounted for up `and down movement on the carriage, a stationary cam track, upper and lower slides mounted for `reciprocating movement radially of the mold carriage, a cam follower roll carried on. the upper slide and running on said cam track, operating. connections between the lower slide. and the mold carrier for moving the latter up and down. when said. lower slide is reciprocated, a transfer slide ,bar mounted. on one of said slides and movable into and out of position to provide a driving connection between said slides,` and manually controlled means for shifting saidr slide bar into and out of operative position..

18,. A. machine for blowing glass articles comprising-.a mold carriage, means for rotating it continuously about a vertical axis, a mold carrier mountedffor up`v and down movement on the carriage, a lstationary cam track,.upper and lower slides mounted for reciprocating movement Yradially of the mold carriage, a cam follower roll carried on the upper slide and running on said cam track, operating connectionsv between the lower lslidey and the-mold carrier. formoving the latter up and down-.whensaid lower slide is. reciprocated, a-transfer slide bar mounted on one ofsaid slides and `movable intos andl out of posi- .tionlto provide a driving connection betweensaid slidesa manualcontrol device, and'means whereby whenA said control device is actuated, said transfer slide bar is automatically operated. for eiecting an operative connection between said slides when the mold carrierreachesk a predeterminedpoint during. each complete rotation of the mold carriage-and for disconnectingl the slides when the mold carrier is at; a different predetermined pointlduring each -lsaidrotation ofthe car'- riage..

19. lA machine vfor blowing glass articles comprising. a moldV carriage, means for rotating it continuously about` awerticalaxis, amold carrier mountedvfor upland down: movement on the carriage, a stationarycam track, upper and lower slidesv mounted for reciprocating movement radially of the mold carriage, avcam follower roll carried -onthe upper slide and running on said cam track, operating connections betweeny the lower slide and the mold carrier for moving the llatter up and down when said lower slide is reupianddownmovements of the mold carrierwhile theisaid upper.' and lowei Aslides are f disconnected; 20'. Alglass blowingmachine-comprising a mold carriage, mea-ns for: continuouslyk 'rotating it about a vertical. airis;v a mold.` carrier .mounted to swing on said carriage, a stationary cam track, upper and lower slides mounted for rotation with the mold carriage and for reciprocation radially thereof, a cam follower roll on the upper said slide and running on said cam track, operating connections between the lower slide and the mold carrier, a connector mounted on one of said slides and movable into and out of position to provide a driving connection between the slides, automatic means for shifting said connector into operative position at a predetermined point during each rotation of the mold carriage and for returning it to an inoperative position at another point during each rotation of the mold carriage, and manually controlled means for preventing operation of said shifting means and thereby continuously maintaining a driving connection between the said slides.

21. A glass blowing machine comprising a mold carriage, means for continuously rotating it about a vertical axis, a mold carrier mounted to swing on said carriage, a stationary cam track, upper and lower slides mounted for rotation with the mold carriage and for reciprocation radially thereof, a cam follower roll on the upper said slide and running on said cam track, operating connections between the lower slide and the mold carrier, a connector mounted on one of said slides and movable into and out of position to provide a driving connection between the slides, a fluid operated motor, a cam operatively connected t said motor and movable thereby into the path of said connector and thereby operable to shift said connector to an inoperative position when the mold carrier reaches a predetermined point duringits rotation with the mold carriage, and means for automatically returning said connector when the mold carrier reaches another predetermined position during each said rotation.

22. A glass blowing machine comprising a mold carriage, means for continuously rotating it about a vertical axis, a mold carrier mounted to swing on said carriage, a stationary cam track, upper and lower slides mounted for rotation with the mold carriage and for reciprocation radially thereof, a cam follower -roll on the upper said slide and running on said cam track, operating connections between the lower slide and the mold carrier, a connector mounted on one of said slides and movable into and out of position to provide a driving connection between the slides, automatic means for shifting said connector into operative position at a predetermined point during each rotation of the mold carriage and for returning it to an inoperative position at another point during each rotation of the mold carriage, an auxiliary cam track, and an auxiliary cam follower roll running on said auxiliary track, said auxiliary roll being mounted for reciprocating movement with said lower slide whereby said auxiliary track controls the position of the mold carrier on the carriage while said slides are disconnected.

23. A glass blowing machine comprising a mold carriage, means for continuously rotating it about a vertical axis, a mold carrier vmounted to swing on said carriage, a stationary cam track, upper and lower slides mounted for rotation with the mold carriage and for reciprocation radially thereof, a cam follower roll on the upper said slide and running on said cam track, operating connections between the lower slide and the mold carrier, a connector mounted on one of said slides and movable into and out of position to provide a driving connection between the slides, automatic means for shifting said connector into `operative position at a predetermined point during each rotation of the mold carriage and for returning it to an inoperative position at another point during each rotation of the mold carriage, an auxiliary cam track, an auxiliary cam follower roll running thereon, and means whereby the auxiliary track is operative through said auxiliary roll to shift said lower slide relative to the upper slide and thereby free the said connector for shifting movement.

24. A glass blowing machine comprising a mold carriage, means for continuously rotating it about a vertical axis, a mold carrier mounted to swing on said carriage, a main stationary cam track, an upper slide, a cam follower roll carried by said slide and running on said cam track, a lower slide, operating connections between the lower slide and the mold carrier, said slides mounted on the carriage for reciprocating movement radially thereof, a transverse slide bar carried on one of said slides and forming a driving connection between said slides, an auxiliary cam track, an auxiliary cam follower roll running thereon, an auxiliary slide carrying said last mentioned roll, said auxiliary slide mounted to reciprocate with said lower slide and having a limited movement relative thereto, and means for shifting said transverse slide bar and thereby transferring the control of the mold carrier from the main track to said auxiliary track, said auxiliary cam being operable through said auxiliary slide to move said lower slide relative to the upper slide and thereby free the transverse slide bar for shifting movement.

25. A machine for molding glass articles comprising a mold carriage, means for rotating the carriage about an axis, a mold mounted to rotate with the carriage, stationary cams providing continuous cam tracks surrounding said axis, cam follower rolls individual to and running on said tracks, mechanism providing operating connections between the rolls and the mold for moving the latter relative to the carriage and thereby causing the'mold to travel in paths determined by the contour of the cam tracks, and manual means operable to effect a shifting of the control of the mold from one said cam to the other.

26. A machine for molding glass articles comprising a mold carriage, means for rotating the carriage about an axis, a mold mounted to rotate with the carriage, stationary cams providing continuous cam tracks surrounding said axis, cam follower rolls individual to and running on said tracks, mechanism providing operating connections between the rolls and the mold for moving the latter relative to the carriage and thereby causing the mold to travel in paths determined by the contour of the cam tracks, automatic means for shifting the control of the mold from one cam track to the other when the carriage reaches a predetermined position during its rotation and for returning the control to the first cam track when the carriage reaches a diierent predetermined position of rotation, and a manual setting device for selectively rendering said automatic shifting means inoperative and causing the control to rcmain under a single cam.

27. A molding machine comprising a mold carriage, means for rotating the carriage about an axis, a mold carrier mounted for rotation with the carriage and movable relative to the carriage, a stationary cam, means providing operating connections between the cam and said mold carrier, said cam being positioned and shaped to control 

